Cosmic ray effects in the Antarctic meteorite Allan Hills A 78084

Details Cosmic ray effects in the Antarctic meteorite Allan Hills A 78084 Cosmic ray effects in the Antarctic meteorite Allan Hills A 78084

May 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985e%26psl..73..171s&link_type=abstract

Earth and Planetary Science Letters (ISSN 0012-821X), vol. 73, no. 2-3, May 1985, p. 171-182. Research supported by the Deutsche

Computer Science

12

Chondrites, Cosmic Rays, Particle Tracks, Aluminum 26, Chronology, Helium Isotopes, Manganese Isotopes, Mass, Neon Isotopes, Meteorites, Cosmic Rays, Antarctic Meteorites, Allan Hills Meteorites, Alha78084, H4 Chondrites, Isotopes, Aluminum 26, Manganese 53, Mass, Rare Gases, Tracks, Samples, Meteorite, Depth, Comparisons, Models, Isotopic Ratios, Ablation, Size, Spallation, Nuclides, Irradiation, Radius, Terrestrial Age, Calculations

Scientific paper

To investigate depth dependences of cosmic-ray-induced effects in the Antarctic H4 chondrite ALPHA 78084, measurements of Al-26, Mn-53, noble gases, and cosmic-ray tracks are performed on documented samples. The Al-26 activities are found to vary between 224 and 246 dpm/kg Si(equ), while Mn-53 activities range from 299 to 359 dpm/kg Fe. Relatively high Ne-22/Ne-21 ratios are measured in all samples, the lowest ratio observed is 1.145. Ablation depths between 1.3 and 6.5 cm are indicated by the track data, thus leading to a preatmospheric mass of about 40 kg, and a 66 percent ablation loss. It is shown that the calculation of preatmospheric size and shielding from measured Ne-22/Ne-21 ratios, using the semi-empirical curves of Bhandari and Potdar (1982), are in agreement with those obtained from track measurements. Both cosmic-ray track and noble-gas data favor a preatmospheric radius of (14 + or - 1) cm.

Affiliated with

Also associated with

No associations

Rating

Cosmic ray effects in the Antarctic meteorite Allan Hills A 78084 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Cosmic ray effects in the Antarctic meteorite Allan Hills A 78084, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cosmic ray effects in the Antarctic meteorite Allan Hills A 78084 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1631795